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Science 13 August 1976:
Vol. 193. no. 4253, pp. 542 - 547
DOI: 10.1126/science.986685
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Articles

Science, Vol 193, Issue 4253, 542-547
Copyright © 1976 by American Association for the Advancement of Science

articles

Discovery of insect anti-juvenile hormones in plants.?2U

WS Bowers, T Ohta, JS Cleere, and PA Marsella

Two simple chromenes with anti-JH activity have been isolated and identified from the bedding plant Ageratum houstoianum. By contact and fumigation these compounds induce precocious metamorphosis and sterilization in several hemipteran species of insects. Certain holometabolous species are sterilized, forced into diapause, or both. Each of these biological actions is equivalent to removal of the corpora allata, which produce the JH's, and is reversible by treatment with exogenous JH. Thus, the action of these compounds is to stop the production or depress the titer of the JH's. To our knowledge, this is the first discovery of anti-JH, and we hope it will guide the way to the emergence of a fourth generation of safe and insect-specific pesticides.


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